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Police cordon at the scene in Roman Way, Strood
Detectives are investigated a possible kidnap at a remote layby in Strood.
Police want to hear from witnesses to an incident in Roman Way at 11.20pm on Wednesday.
The area, on a hill above the Medway Valley Leisure Park, was cordoned off until yesterday.
A caller said they had seen a person - who they think might have been a youth - being put in a car, apparently against their will.
DCI Jon Clayden, from Kent Police, said: "We are keen to hear from anyone who can help us with this investigation.
"We have not had any reports of missing people and we are keen to hear from any parents who may have found their teenager late at night in the Strood area and taken them home.
"Clearly this is a concerning incident and we are keen to find out exactly what has occurred. We are now in the process of examining CCTV and are following-up on a number of lines of enquiry.
"If anyone can help police with this investigation, please contact Kent Police."
Phone Kent Police on 101 - quoting reference 11-1872 - or Kent Crimestoppers, anonymously, on 0800 555111.